Inmate suicides occur in all prisons. A better measure would be comparing suicide rates at Gitmo to other prison systems in the US and other countries. Not as sensational nor politically riveting, but then I guess it's what one wants to derive from the topic that matters.

In the prison system I'm familiar with, New York State, inmate suicides occur several times more frequently within the group of "violent inmates" as opposed to those serving for non-violent offenses. Local and county jail suicide rates are generally higher than the State prison rate, most certainly due to officer training and officer to inmate staffing ratio, and counseling programs available to inmates are much better in the State system.

Bottom line; lessening inmate suicides requires highly trained and motivated staff to listen to and observe inmate behavior and be knowledgeable of the warning signs of imminent suicidal behavior. However, a person determined to commit suicide will likely succeed.